patch 9.0.1830: Vim9: crash when accessing a null object Commit: https://github.com/vim/vim/commit/d7085a06358c22250a27186bb7d52112ed4addd1 Author: Gianmaria Bajo <mg1979.git@gmail.com> Date: Thu Aug 31 18:15:26 2023 +0200 patch 9.0.1830: Vim9: crash when accessing a null object Problem: Vim9: crash when accessing a null object Solution: Check accessing a NULL object in def function An object is NULL when the variable is declared, but the constructor isn't called. Accessing/setting a member on the object crashed Vim. Note: this happens inside def functions, at script level things work differently. Accessing a NULL object member results in E1360 (correctly), while setting a value on it results in E1012 (type mismatch) so there's still something to fix. closes: #12973 Signed-off-by: Christian Brabandt <cb@256bit.org> Co-authored-by: Gianmaria Bajo <mg1979.git@gmail.com>

" Vim indent file
" Language:		YACC input file
" Maintainer:		Doug Kearns <dougkearns@gmail.com>
" Previous Maintainer:	Nikolai Weibull <now@bitwi.se>
" Last Change:		2022 April 25

" Only load this indent file when no other was loaded.
if exists("b:did_indent")
  finish
endif

let b:did_indent = 1

setlocal indentexpr=GetYaccIndent()
setlocal indentkeys=!^F,o,O
setlocal nosmartindent

let b:undo_indent = "setl inde< indk< si<"

" Only define the function once.
if exists("*GetYaccIndent")
  finish
endif

function GetYaccIndent()
  if v:lnum == 1
    return 0
  endif

  let ind = indent(v:lnum - 1)
  let line = getline(v:lnum - 1)

  if line == ''
    let ind = 0
  elseif line =~ '^\w\+\s*:'
    let ind = ind + matchend(line, '^\w\+\s*')
  elseif line =~ '^\s*;'
    let ind = 0
  else
    let ind = indent(v:lnum)
  endif

  return ind
endfunction